Colorado Avalanche defenseman Ryan Wilson is out indefinitely with an ankle injury, coach Joe Sacco said after team practice Sunday.

Wilson, who has played in all eight games this season and was averaging more than 20 minutes of ice time, was injured in Colorado’s 3-1 victory over the Edmonton Oilers on Saturday at the Pepsi Center.

The Avs are carrying eight defenseman, so they might not put Wilson on injured reserve, or recall a player from their American Hockey League affiliate.

Wilson will immediately be replaced in the six-man D-corps by veteran Shane O’Brien or second-year pro Tyson Barrie. Only those two, along with five others, including backup goalie Jean-Sebastien Giguere, practiced Sunday, while the rest of the team had meetings and sought treatment after playing five games in eight days.

Sacco said Semyon Varlamov will start in goal Monday night against the visiting Dallas Stars.

Monday’s game will serve as the 1,000th career NHL regular-season game for right-winger Milan Hejduk. The last remaining member of the Avs’ 2001 Stanley Cup team will be honored pregame, with NBC Sports Network covering the event and pushing back the opening puck drop until 7:13 p.m.